Vary the flavors
Frankfurters are certainly the quickest choice for sausage rolls since they don't need to be cooked or boiled first. If you have time, cook some Toulouse-style sausages (coarse pork sausages seasoned with garlic). Remove the skin and proceed in the same way.

In a green suit
Steam some spinach; squeeze dry and place onto the pastry to create a little "nest" for the sausage.

Lighter and lower carb
Replace the puff pastry with phyllo pastry

1. Cut strips of puff pastry. Roll a mini-sausage in each strip.
2. Brush the tops with egg yolk.
3. Place in a 210° C (425° F) oven for 15-20 minutes until the pastry is puffed and golden.